W25Q64FVSFAQ Equivalent & Substitute Parts

Part Overview

The W25Q64FVSFAQ is a 64Mbit NOR Flash memory IC manufactured by Winbond Electronics, featuring SPI Quad I/O and QPI interface capabilities. This device is designed for non-volatile data storage applications requiring high-speed serial access with quad-channel I/O support. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and electrical compatibility for ongoing production and maintenance requirements.

Key Parameters

Parameter	Value
Memory Size	64Mbit
Memory Format	FLASH - NOR
Memory Interface	SPI - Quad I/O, QPI
Memory Organization	8M x 8
Package / Case	16-SOIC (0.295", 7.50mm Width)
Voltage - Supply	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the W25Q64FVSFAQ is determined by strict equivalence across the following critical parameters:

Memory Capacity & Organization: The substitute part must provide 64Mbit capacity with 8M x 8 organization to ensure direct functional replacement without firmware or software modification.

Package & Mounting: The 16-SOIC surface mount package with 0.295" (7.50mm) width is mandatory for PCB layout compatibility and assembly process alignment.

Electrical Specifications: Supply voltage range of 2.7V to 3.6V and operating temperature range of -40°C to 105°C must be maintained to ensure operation within the same system power and thermal constraints.

Memory Interface: SPI Quad I/O capability is required for protocol compatibility. QPI support is not mandatory for substitution but represents an enhancement when available.

Manufacturer & Series: Winbond Electronics SpiFlash® series devices are the primary source for compatible alternatives, ensuring consistent device behavior and support infrastructure.

The W25Q64JVSFAQ qualifies as a direct substitute based on these parameters while offering improved performance characteristics.

Parameter Comparison

Parameter	W25Q64FVSFAQ (Main Part)	W25Q64JVSFAQ (Substitute)
Manufacturer	Winbond Electronics	Winbond Electronics
Series	SpiFlash®	SpiFlash®
Memory Size	64Mbit	64Mbit
Memory Format	FLASH - NOR	FLASH - NOR
Memory Organization	8M x 8	8M x 8
Memory Interface	SPI - Quad I/O, QPI	SPI - Quad I/O
Clock Frequency	104 MHz	133 MHz
Access Time	7 ns	6 ns
Write Cycle Time - Page	3ms	3ms
Voltage - Supply	2.7V ~ 3.6V	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)
Package / Case	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The W25Q64JVSFAQ is the qualified substitute for the obsolete W25Q64FVSFAQ. This substitution is supported by:

Product Status Alignment: The W25Q64JVSFAQ maintains active product status with Winbond Electronics, ensuring continued availability, technical support, and supply chain stability compared to the obsolete W25Q64FVSFAQ.

Electrical Compatibility: Both devices operate within identical supply voltage (2.7V to 3.6V) and temperature ranges (-40°C to 105°C), ensuring direct integration into existing power distribution and thermal management systems without modification.

Package Equivalence: Identical 16-SOIC surface mount packaging with matching footprint dimensions (0.295", 7.50mm width) permits direct PCB layout reuse and automated assembly process compatibility.

Regulatory Compliance: Both parts maintain REACH Unaffected status, confirming equivalent environmental and regulatory compliance posture.

Performance Enhancement: The W25Q64JVSFAQ provides improved performance specifications (133 MHz clock frequency versus 104 MHz, 6 ns access time versus 7 ns) while maintaining backward compatibility with existing firmware and software implementations.

Frequently Asked Questions (FAQ)

Q: Can the W25Q64JVSFAQ be used as a direct replacement for the W25Q64FVSFAQ without PCB modifications?

A: Yes. Both devices share identical 16-SOIC package dimensions and pinout compatibility. No PCB layout changes are required for substitution.

Q: Are there differences in the memory interface between these parts?

A: The W25Q64FVSFAQ supports both SPI Quad I/O and QPI modes, while the W25Q64JVSFAQ supports SPI Quad I/O. Both devices are compatible with SPI Quad I/O protocol implementations. Applications requiring QPI-specific functionality should verify firmware compatibility with the W25Q64JVSFAQ.

Q: What is the impact of the higher clock frequency in the W25Q64JVSFAQ?

A: The W25Q64JVSFAQ operates at 133 MHz compared to 104 MHz in the W25Q64FVSFAQ. This represents improved performance and faster data access. Existing firmware and software implementations operate without modification at the lower frequency, ensuring backward compatibility.

Q: Are the supply voltage requirements identical?

A: Yes. Both devices operate within the 2.7V to 3.6V supply voltage range and share identical operating temperature specifications of -40°C to 105°C.

Q: What is the Moisture Sensitivity Level (MSL) for both parts?

A: Both the W25Q64FVSFAQ and W25Q64JVSFAQ are classified as MSL 3 with a 168-hour floor life. Identical moisture handling and storage procedures apply to both devices.

Q: Is the W25Q64JVSFAQ available in the same packaging options?

A: Yes. The W25Q64JVSFAQ is supplied in the 16-SOIC surface mount package matching the W25Q64FVSFAQ specifications.

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